Most cases of liver cancer are caused by liver disease. Risk factors include being overweight, smoking, drinking excess alcohol and Hepatitis B and C.
Many experts blame the surge in liver cancer on higher rates of obesity and more Hepatitis C infections in baby boomers.
Blood and organ transplants didn't start screening for Hepatitis C until 1992 and that was a common way it was spread.
The researchers hope better treatment of Hep C and lifestyle changes can help prevent more cases of cancer.
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